Insulator.



R. A.MANWAR|NG & l. T. HESSEL.

INSULATOR.

APPLICATION FILED APR.23. 1914.

1,140,050. Patented May 18, 1915.

UNITED STATES PATENT OFFICE.

ROBERT A. MANWARING: AND JAMES T. HESSEL, OF NEW HAVEN, CONNECTICUT.

' INSULATOR.

Specification of Letters Patent.

Patented May 18, 1915.

Application filed April 23, 1914. Serial No. 834,011.

To all whom it ma concern Be it known t at we, ROBERT A. MAN- \VARING and JAMES T. HESSEL, citizens of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Insulators; and we do hereby declare the following, when taken in con-- nection with the accompanying drawings and the characters of reference marked thereon, tobe a full, clear, and exact de-' scription of the same, and which said drawings constitute part of this application, and represent, in- 1 Figure 1 a side view of a suspension lamp with a conductor connected with an insulator constructed in accordance with our invention. Fig. 2 a side view of one of our insulators detached. Fig. 3 an underside view of the same. Fig. it a view in vertical section of one of the insulators indicating how it is supported and how the twin conductor is attached to it.

This invention relates to an improvement in insulators particularly those attached to a pin and adapted for twin conductions for are lamps, but applicable for various other places where a conductor is arranged vertically. When a conductor extends in a vertical direction, as for instance, on a pole for an arc lamp, it is desirable that the conductor should be held away from possible contact with the pole or other structure from which the lamp is suspended.

The object of this invention is to provide an insulator which may be sup orted on a bracket with clearance grooves or the conductor; "and the invention consists in the construction hereinafter described and particularly recited in the claims.

In carrying out our invention, we form the insulator 2 from porcelain, glass or other insulating material. This insulator has substantially straight sides and the usual threaded central recess 3 whereby it may be attached to the upper end 4 of any suitable bracket or pin 5 and in its'lower end it is provided with the usual inner petticoat 6 and outer etticoat 7 At one or more a post 11 supporting an arc lamp 12. The

twin conductor 13 extends downward substantially parallel with the post and is con nected with our insulators 2. The conductors pass through an y one of the several vertical grooves 8 as is most convenient, and a plurality of grooves is provided so that when the insulator is screwed onto the supporting bracket one groove will stand in proper position to receive the conductor. These conductors are secured to the insulators by ties 14 which are seated in the annular grooves 9. We thus provide an insulator adapted to have vertically arranged conductors secured to them without bending the conductors and enabling the conductors to be firmly connected with the insulators, and an insulator which is provided with the same insulating properties as insulators adapted to be used for horizontal leads.

1. A single piece insulator having substantially straight sides, a central pin recess entering the lower end, and formed inits outer surface with a conductor groove extending throughout its length in a plane substantially parallel with the axis of the central recess.

2. A single piece insulator having substantially straight sides, a central pin recess entering the lower end, and formed in its outer surface with a plurality of conductor grooves extending throughout its length in a plane substantially parallel with the axis of the central recess.

3. A single piece insulator having substantially straight sides, a central pin recess entering the lower end and formed inits outer surface with a plurality of vertically arranged conductor grooves extending throughout its length in a plane substantially parallel With the axis of the central recess, and with an annular groove arranged at right angles to the conductor grooves and intersecting the same.

In testimony whereof, We have signed this specification in the presence of two subscribmg wltnesses.

- ROBERT A. MANWARING.

JAMES T. HESSEL.

Witnesses:

ROBERT-B. BUTLER, I. V. LARKIN. 

